Siemens 192-204 Room Temp Thermostat, Pneumatic, Dual Setpoint, DA, Day/Night, Fahrenheit

Siemens 192-204 Room Temp Thermostat, Pneumatic, Dual Setpoint, DA, Day/Night, Fahrenheit. Siemens TH 192 S Thermostats are proportional single out, single setpoing, 1 or 2 pipe sensor controllers. They include wall mouting plate and various rough in terminal box options.